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          Institute: Fritz-Haber-Institut     Collection: Molecular Physics     Display Documents



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ID: 478426.1, Fritz-Haber-Institut / Molecular Physics
Coherent reflection of He atom beams from rough surfaces at grazing incidence
Authors:Zhao, Bum Suk; Schewe, Christian; Meijer, Gerard; Schöllkopf, Wieland
Language:English
Date of Publication (YYYY-MM-DD):2010-09-24
Title of Journal:Physical Review Letters
Journal Abbrev.:Phys. Rev. Lett.
Volume:105
Issue / Number:13
Start Page:133203-1
End Page:133203-4
Copyright:© 2010
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We report coherent reflection of thermal He atom beams from various microscopically rough surfaces at grazing incidence. For a sufficiently small normal component kz of the incident wave- vector of the atom the reflection probability is found to be a function of kz only. This behavior is explained by quantum-reflection at the attractive branch of the Casimir-van der Waals interaction potential. For larger values of kz the overall reflection probability decreases rapidly and is found to also depend on the parallel component kx of the wave-vector. The material specific kx dependence for this classic reflection at the repulsive branch of the potential is discussed in terms of an averaging- out of the surface roughness under grazing incidence conditions.
External Publication Status:published
Document Type:Article
Communicated by:Gerard Meijer
Affiliations:Fritz-Haber-Institut/Molecular Physics
Identifiers:URL:http://link.aps.org/doi/10.1103/PhysRevLett.105.13...
DOI:10.1103/PhysRevLett.105.133203
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zhao_resubmit_100831_edoc.pdf  [212,00 Kb] [Comment:Author Version]  
 
1005.3711v1.pdf  [184,00 Kb] [Comment:arXiv:1005.3711v1 [physics.atom-ph] 20 May 2010]  
 
e133203.pdf  [312,00 Kb]   
 
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